My first use of this secondary fermentation method is imminent! I was told
that I needed piping or a hose to run the wort into the carbouy or it might
turn to vinegar. Can someone explain why this happens and how I can avoid
it. My thought was to place the fermenter above the carbouy and run the wort
down some clear PVC piping to the very bottom of the carbouy. Is this
advisable?

Second, I assume I just have the sugar at the bottom of the carbouy and let
the flow mix it for me - or should I just stir it in later?

J